Resolve DNS records (A, AAAA, MX, NS, TXT, CNAME) for a domain using Visual Sentinel\
AI agents call vs_dns_check to retrieve information from Visual Sentinel MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
DNS resolution is a read-only operation that queries and returns existing DNS records. It does not modify, delete, or execute anything; it simply retrieves data. The severity is low because DNS records are public information and misuse would have minimal blast radius (e.g., gathering reconnaissance). No financial, destructive, or code-execution risk is present.
From the tool's definition Tool name is 'vs_dns_check' and description states it 'Resolve[s] DNS records (A, AAAA, MX, NS, TXT, CNAME) for a domain' — a pure query operation that retrieves publicly available DNS information with no side effects.
Attacks that exploit this kind of access
Resolve DNS records (A, AAAA, MX, NS, TXT, CNAME) for a domain using Visual Sentinel\. It is categorised as a Read tool in the Visual Sentinel MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Visual Sentinel MCP Server MCP server in PolicyLayer and add a rule for vs_dns_check: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Visual Sentinel MCP Server. Nothing to install.
vs_dns_check is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the vs_dns_check rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for vs_dns_check. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
vs_dns_check is provided by the Visual Sentinel MCP Server MCP server (visualsentinel/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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